222 Genera of Humming Birds. 



315. Oreopvra cinereicauda, Lawr., Ann. N.Y. Lye. Nat. 

 Hist., vol. viii., p. 485. 



Grey-tailed Hitmniing-bird, Gould, Mon. Troch. Suppl., 

 1886, p. 10. 



I'Oreopyre a queue cendree, Muls. Hist. Nat. Ois. Mou., 

 1878, t. iv., p. 165. 



Habitat. — Costa Rica. 



Male. — V^ery much like the preceding species, from which 

 it differs only by the tail, which is longer and ashy-white with 

 dark tips. 



This extremely rare species was discovered by Mr. Garcia, 

 near Cartago, Costa Rica. I have only one specimen which I 

 killed at Navarro, Costa Rica, in May, 1877. 



Female. — Unknown, although it has been described as 

 O. castaneiventris, by Lawrence ; but I am in doubt about it 

 as for the female of O. leucaspis. 



316. Oreopvra heaiileuca, Salv., P.Z.S., 1864, p. 584. 

 Oreopyra hemileuca, Boucard, P.Z.S., 1878, p. 6g. 

 Cocligena hemileuca, Elliot, Syn. H. Birds, 1879, p. 31. 

 White-bellied Cacique, Gould, Mon. Troch., Suppl., 1886, 



I'Oreopyre a gorge d'un lilas violace, Muls., Hist. Nat. Ois. 

 Mou., 1878, t. iv., p. 167. 



Habitat. — Costa Rica. 



Male. — Top of head brilliant metallic green. Neck dark 

 green, black in certain lights. Back dark shining green 

 passing to golden on rump and uppertail-coverts. Median 

 rectrices bronze-green. Laterals bronze-green, darker near the 

 tips which are whitish-gray. Chin and sides of throat 

 metallic green. Throat metallic amethyst. Breast and 

 abdomen pure white. Sides of breast and flanks golden- 

 green. Undertail-coverts pale greenish-brown in centre, 

 edged with white. Wings purplish-brown. Bill black. 



Total length, 4|in. Wings, 2|. Tail, if. Culmen, |-. 



Female. — Same as the male, excepting the throat which is 

 white, spotted with green. 



This beautiful and exceedingly rare species was discovered 

 by Arce, at Turrialba, Costa Rica. 



